A boat berthed on the Broads has fallen victim to high tides and heavy rain.
The boat, which was moored at Reedham, sank on Sunday, leading to Coastguard and Broads Authority rangers dealing with the incident.
It came as the Broads Authority said the river network has seen "significantly high-water levels" due to high tides and three storms.
The boat was unoccupied at the time but a man does live on it on the River Yare.
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A woman who lives along the riverside said the boat had been raised up by high waters onto the quayside and it then sank.
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She said she saw about six Coastguard by the boat as part of a clean-up operation and added it was "terrible" to see that the man's vessel had sunk.
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The Broads Authority has also marked the location of the sunken boat, which is a Moonraker 36 Sportsman.
Efforts are being made locally to secure personal items from the vessel.
A statement from the Broads Authority said: "We are aware of the sunken vessel.
"Rangers have clearly marked the location in the navigation and are in contact with the owner and there was no one on board the vessel at the time it sank.
"A combination of high winter tides and three recent storms, Agnes, Babet and Ciarán, with excessive rainfall have led to significantly high-water levels in the Broads system."
Reedham had been highlighted as an area most at risk of flooding by the Environment Agency after it announced flood alerts on Friday.
Ferry Road, near Reedham Ferry, was submerged after the River Yare's high tide over the weekend.
An Environment Agency spokesman had said: "After the weekend the tides will start to fall away allowing the freshwater river flows to drain out to sea at low tide as normal again."
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